linux-kernel - [PATCH 10/12] ARM: dts: mmp3-dell-ariel: Add the power button node

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Message-Id: <20210121034130.1381872-11-lkundrak@v3.sk>
Date:   Thu, 21 Jan 2021 04:41:28 +0100
From:   Lubomir Rintel <lkundrak@...sk>
To:     Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>
Cc:     Rob Herring <robh+dt@...nel.org>, SoC Team <soc@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Lubomir Rintel <lkundrak@...sk>
Subject: [PATCH 10/12] ARM: dts: mmp3-dell-ariel: Add the power button node

This adds support for the power button attached to the Embedded Controller
on a Dell Wyse 3020 "Ariel" board.

However, while the EC itself is controlled via I2C, the input capability
for the power button acts as a separate device attached to the SPI, hence
it has a separate device node.

Signed-off-by: Lubomir Rintel <lkundrak@...sk>
---
 arch/arm/boot/dts/mmp3-dell-ariel.dts | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/mmp3-dell-ariel.dts b/arch/arm/boot/dts/mmp3-dell-ariel.dts
index 565cd0fadf3d3..c4a6bd876d849 100644
--- a/arch/arm/boot/dts/mmp3-dell-ariel.dts
+++ b/arch/arm/boot/dts/mmp3-dell-ariel.dts
@@ -119,8 +119,16 @@ firmware-flash@0 {
 };
 
 &ssp2 {
-	cs-gpios = <&gpio 56 GPIO_ACTIVE_LOW>;
 	status = "okay";
+	cs-gpios = <&gpio 56 GPIO_ACTIVE_LOW>;
+
+	power-button@0 {
+		reg = <0>;
+		interrupt-parent = <&gpio>;
+		interrupts = <60 IRQ_TYPE_EDGE_RISING>;
+		compatible = "dell,wyse-ariel-ec-input", "ene,kb3930-input";
+		spi-max-frequency = <33000000>;
+	};
 };
 
 &gpu_2d {
-- 
2.29.2